# Math Help - How to figure out binominal distribution

1. ## How to figure out binominal distribution

Here is the question:

I need help figuring out what is the success rate of this. Thanks for your help.

2. $
P(A\cup B) = P(A)+P(B) = \frac{1}{4} + \frac{1}{8} = \frac{2}{8} + \frac{1}{8} = \frac{3}{8}
$

3. Thank you for help pickslides.

However, I am now stuck on figuring out part a)
It tells you it is spun once.
So is the answer 1C1 x (.375)^1

4. My answer is correct for 1 trial.

Using the binomial theorem

$
P(A \cup B) = \binom{1}{1}\left(\frac{3}{8}\right)^1\left(\frac{ 5}{8}\right)^0 = \frac{3}{8}
$

5. Excellent explanation. Thanks!